Nozzle



Oct. 30, 1956 s. E. MILLER 2,768,860

NOZZLE Filed May 24, 1954 INVENTOR.

SIDNEY 5. MI LLE'E United States Patent lee 2,768,860 NOZZLE Sidney E. Miller, Suflield, Conn., assignor to American Bosch Arma Corporation, acorporation of New York Application May 24, 1m, Serial No. 431,936

4 Claims. (c1. 299-1016) This invention relates to nozzles for fuel injection apparatus, or the like, and has particular reference to a new and improved nozzle construction which is relatively inexpensive and simple in construction yet efficient in operation and the process of making the same.

The principal object of the invention is to provide a new and improved nozzle which is relatively inexpensive and simple in construction and assembly and etficient in operation and to a new and improved method of making the same.

Another object is to provide a new and improve'd nozzle of the variable area or orifice type which is self centering and acts both as a check valve and variable orifice nozzle.

Another object is to provide a nozzle of the type set forth wherein the nozzle operating elements may be completely assembled as a unit and then this unit operatively connected to the nozzle body.

Another object is to provide a new and improved method of making fuel injection nozzles, or the like.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as set forth in the accompanying claims, as the preferred form has been given by way of illustration only.

Referring to the drawings:

Fig. 1 is a longitudinal sectional view of a nozzle constructed according to the invention;

Fig. 2 is a top view of one form of clip that may be embodied in the nozzle; and

Fig. 3 is a top view of one form of shim that may be embodied for varying the opening pressure of the nozzle.

Referring more particularly to the drawings wherein simple reference characters designate corresponding parts throughout, the nozzle shown embodying the invention comprises the nozzle body 11 having the central orifice 12 in which may be positioned the filter element 13.

The nozzle body 11 is provided with the chamber 14 which communicates with the orifice 12 and said chamber 14 is adapted to contain the operative elements of the nozzle.

In the form of the invention shown, the operative portion of the nozzle comprises an annular plate 15 having a central orifice or opening 16, through which extends the poppet valve 17 having the enlarged head 18 which head is greater in diameter than opening 16. It will be seen from the drawing that opening 16 is substantially greater in diameter than valve 17.

At its opposite end, poppet valve 17 is provided with the headed portion 19 which is of such diameter that it can be inserted through the opening or bore 16 and has a portion adapted to receive the spring clip 20 of the form shown in Fig. 2, or of other suitable form and which acts as a seat for the tapered coil spring 21 which has its opposite end adjacent plate 15.

2,768,860 Patented Oct. 30,1956

' If desired, the spring 21 may be of carefully controlled tension and size so as to provide the proper or desired opening pressure to the nozzle. If the spring seats are not so carefully controlled or if it is desired to vary or change the opening pressure of the nozzle, shims 22 of the form shown in Fig. 3 may be positioned between the surface of plate and the adjacent end-of spring 21.

In construction, the nozzle holder 11 is formed and the nozzle unit is assembled and then placed into the chamber 14 with the plate 15 seated on shoulder 23 and the end 24 of nozzle body 11 then spun over, crirnped 7 in that theydo not have any tip sensitivity to manifold pressure; Further, the nozzle eliminates all dead volume and is a very inexpensive and suitable design not affected by the discharge pressure. Also, since it is unguided and self-seating, it acts as both a check valve and variable area nozzle.

It is pointed out that with the nozzle of the present invention, and the method of the present invention wherein the nozzle body is formed and the nozzle unit is also formed and assembled into a unitary construction, and then this unitary construction assembled into the nozzle body that a relatively simple and inexpensive construction and method are provided, thus greatly reducing the cost of manufacture of such device and also, allowing the manufacture of a device in which the operating unit may be replaced or changed.

From the foregoing it will be seen that I have provided a new and improved nozzle and method of making the same which possesses all of the objects and advantages set forth above.

I claim:

1. In a device of the character described, a nozzle body having a fuel passage therethrough and an integral extension portion having a chamber adjacent an end thereof and communicating with said fuel passage, an internal annular shoulder in the wall of said chamber adjacent the free end of said extension, an annular plate in said chamber having an aperture and having its periphery engaging said internal annular shoulder, the ends of said extension adjacent said annular plate being turned inwardly to form a flange overlying the periphery of said plate to thereby retain said plate on said shoulder, a valve member extending through said aperture of said plate and having a head portion of greater diameter than said aperture and adapted to control the discharge of fuel through said aperture, a spring in said chamber surrounding said valve member and means for securing said spring in position on said valve member.

2. In a device of the character described, a nozzle body having a fuel passage therethrough and an integral extension portion having a chamber adjacent an end thereof and communicating with said fuel passage, an internal annular shoulder in the wall of said chamber adjacent the free end of said extension, an annular plate in said chamber having an aperture and having its periphery engaging said internal annular shoulder, the ends of said extension adjacent said annular plate being turned inwardly to form a flange overlying the periphery of said plate to thereby retain said plate on said shoulder, a valve member extending through said aperture on said plate and having a head portion of greater diameter than said aperture and av 1 adapted to control the discharge of fuel through said aperture, a spring in said chamber Surrounding said valve member and means for securing said spring in position on said valve member, said. spring surrounding. said valve member being of tapered cross section, with its, area of greatest cross section adjacent said plate.

3'. In a device of the character described, a nozzlebody having a fuel passage therethrough and an integral extension portion having a chamber adjacent an. endvthereof, and communicating with said fuel, passage, an internal annular shoulder in the wall of said chamber adjacent the free end of said extension, an annular plate-in. said chamber having an aperture and having its periphery engaging said internal annular shoulder, the ends of said extension, adjacent said annular plate being turned inwardly to form a flange overlying the periphery of said plate to thereby retain said plate on said shoulder, a valve member extending through said aperture on said plate and.

having a head portion of greater diameter than said aperture and adapted to control the discharge of fuel through sion portion having a chamber adjacent an end thereof and communicating with said fuel passage, an internal annular shoulder in the wallz of said chamber adjacent the free end of said extension, an annular plate in said chamber having an aperture and having its periphery engaging said internal annular shoulder, the ends of said extension adjacent said annular plate being turned inwardly to form a flange overlying the periphery of said plate to thereby Y retain said plate on said shoulder, a valve member extending through, said aperture on said plate and having a head.

portion of greater diameter than said aperture and adapted to control the discharge of fuel through said aperture, a spring-insaid chamber surrounding said valve member and means for securing said spring in position on said valve member, said plate, valve and spring being assembled as a separate unit and said unit then being secured in operative position on said body.

References Cited in the file of this patent UNITED STATES PATENTS 1,876,980 Lentell Sept. 13, 1932 2,560,799 Johnson July 17, 1951 2,612,408 Kurata Sept. 30, 1952 2,665,167 High Jan. 5, 1954 FOREIGN PATENTS 537,414 France Mar. 3, 1922 839,831 France Jan. 7, 1939 

